'Sharknado' and 'World War Z'

A behind-the-scenes look at filming around the world for television and movies as seen from the streets.

Mary McNamara

Pity poor "Pacific Rim," coming out right after Syfy's "Sharknado," which has established itself as the Marine Monster Movie of the Summer.

Why did a TV flick with pre-green-screen production values about shark-filled tornadoes striking Los Angeles generate so much attention? The same reason "World War Z" got so much heat -- because they are essentially the same story.